Technical management of sow herds : development and results
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چکیده
منابع مشابه
langauge needs analysis of undergraduate business management and economics students
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15 صفحه اولThe Repeatability of Pregnancy Rate in Danish Sow Herds
The individual differences between sows in ability to become pregnant were investigated. Data from a sample of 10 Danish sow herds with a total of 5786 sows was analyzed. The purpose was to estimate variance between sows in ability to become pregnant. The results indicated a low variability between sows in this ability. 7 % of the total variance could be accounted for as the difference between ...
متن کاملManagement factors associated with farrowing rate in commercial sow herds in Ontario.
The objectives of this study were to determine associations between low farrowing rate and various management factors in sow herds. In 30 sow herds, a management survey, breeding observations, semen evaluation, and semen storage temperature monitoring were completed. Herds with an average farrowing rate of < 85% were classified as low farrowing rate herds while those with an average farrowing r...
متن کاملOptimal Replacement Policies and Economic Value of Clinical Observations in Sow Herds Optimal Replacement Policies and Economic Value of Clinical Observations in Sow Herds 2 3
25 Even though several sow replacement models have been published, integrating 26 information about the health status of sows has not yet been handled satisfactorily. This 27 paper presents a framework for integrating a Weak Sow Index (WSI) into an existing 28 sow replacement model. The WSI, which is developed as part of this study, quantifies 29 various clinical signs into one numerical value ...
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ژورنال
عنوان ژورنال: Annales de Zootechnie
سال: 1984
ISSN: 0003-424X
DOI: 10.1051/animres:19840318